Contrary to the current (Nov. 2010) product description, the Reflections hardcover collects Reflections issues #5-9, not #5-10 or #1-5. It is black with the "Kabuki" kanji debossed on the front cover, and does not have a dust cover (unless my copy was defective). The black cover makes it look somewhat like a hardcover sketchbook, incidentally, which suits the contents rather well.
Reflections presents a selection of David Mack's art, including sketches, finished paintings, comics pages, and so forth; most of this is related to the Kabuki series. Each piece (with just a few exceptions) has a brief caption telling you what it is, when it was made, and what media was used, and more than a few have some description of the process. In a few cases Mack shows us photos of a piece at various stages of completion and comments on how he proceeded from step to step.
Also included are a few pages with photos of David Mack and his friends at conventions and other places, photos of fans' Kabuki/Noh tattoos, and even some pics of fans in Kabuki-related costumes. At the end is a selection of letters from fans and friends about Mack's work, and the script for the first 14 pages of Kabuki: The Alchemy #1. (The complete Alchemy #1 script is included at the end of the hardcover Alchemy collection.)
I especially like Mack's watercolors, but the appeal in this book for me is the general range of creativity presented, particularly in some of the sketchbook excerpts, which somehow convey an impression of artists hanging out together, sketching each other and generally enjoying each others' creative influence.
This book will probably appeal primarily to fans of the Kabuki series; if you are not a fan of the series already, this may not be a good starting point. It seems like a good book to page through when in need of creative inspiration (by which I mean not ideas for art, but rather a sort of creative morale-boost).